sdl-clipcursor.patch

diff -aurN SDL2-2.0.4/include/SDL_video.h SDL2-2.0.4-fixed/include/SDL_video.h
--- SDL2-2.0.4/include/SDL_video.h	2016-01-02 11:56:31.000000000 -0800
+++ SDL2-2.0.4-fixed/include/SDL_video.h	2016-04-04 20:54:47.332652900 -0700
@@ -39,6 +39,11 @@
 extern "C" {
 #endif
 
+extern int SDL_ClipCursorMarginLeft;
+extern int SDL_ClipCursorMarginTop;
+extern int SDL_ClipCursorMarginRight;
+extern int SDL_ClipCursorMarginBottom;
+
 /**
  *  \brief  The structure that defines a display mode
  *
diff -aurN SDL2-2.0.4/src/video/windows/SDL_windowswindow.c SDL2-2.0.4-fixed/src/video/windows/SDL_windowswindow.c
--- SDL2-2.0.4/src/video/windows/SDL_windowswindow.c	2016-01-02 11:56:31.000000000 -0800
+++ SDL2-2.0.4-fixed/src/video/windows/SDL_windowswindow.c	2016-04-04 20:54:47.348266600 -0700
@@ -113,6 +113,22 @@
     data->expected_resize = SDL_FALSE;
 }
 
+int SDL_ClipCursorMarginLeft   = 0;
+int SDL_ClipCursorMarginTop    = 0;
+int SDL_ClipCursorMarginRight  = 0;
+int SDL_ClipCursorMarginBottom = 0;
+
+void WIN_ClipCursor(const RECT * orig) {
+    RECT adjusted = *orig;
+
+    adjusted.left   += SDL_ClipCursorMarginLeft;
+    adjusted.top    += SDL_ClipCursorMarginTop;
+    adjusted.right  -= SDL_ClipCursorMarginRight;
+    adjusted.bottom -= SDL_ClipCursorMarginBottom;
+
+    ClipCursor(&adjusted);
+}
+
 static int
 SetupWindowData(_THIS, SDL_Window * window, HWND hwnd, SDL_bool created)
 {
@@ -244,7 +260,7 @@
             GetClientRect(hwnd, &rect);
             ClientToScreen(hwnd, (LPPOINT) & rect);
             ClientToScreen(hwnd, (LPPOINT) & rect + 1);
-            ClipCursor(&rect);
+            WIN_ClipCursor(&rect);
         }
     }
 
@@ -812,7 +828,7 @@
             if (GetClientRect(data->hwnd, &rect) && !IsRectEmpty(&rect)) {
                 ClientToScreen(data->hwnd, (LPPOINT) & rect);
                 ClientToScreen(data->hwnd, (LPPOINT) & rect + 1);
-                ClipCursor(&rect);
+                WIN_ClipCursor(&rect);
             }
         }
     } else {